EP0838652B1 - Echangeur de chaleur - Google Patents

Echangeur de chaleur Download PDF

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Publication number
EP0838652B1
EP0838652B1 EP97118461A EP97118461A EP0838652B1 EP 0838652 B1 EP0838652 B1 EP 0838652B1 EP 97118461 A EP97118461 A EP 97118461A EP 97118461 A EP97118461 A EP 97118461A EP 0838652 B1 EP0838652 B1 EP 0838652B1
Authority
EP
European Patent Office
Prior art keywords
tank
base plate
folded
folded portions
heat exchanger
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP97118461A
Other languages
German (de)
English (en)
Other versions
EP0838652A2 (fr
EP0838652A3 (fr
Inventor
Mikio Fukuoka
Yoshifumi Aki
Naoki Sugimoto
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Denso Corp
Original Assignee
Denso Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Denso Corp filed Critical Denso Corp
Publication of EP0838652A2 publication Critical patent/EP0838652A2/fr
Publication of EP0838652A3 publication Critical patent/EP0838652A3/fr
Application granted granted Critical
Publication of EP0838652B1 publication Critical patent/EP0838652B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/02—Header boxes; End plates
    • F28F9/0219—Arrangements for sealing end plates into casing or header box; Header box sub-elements
    • F28F9/0224—Header boxes formed by sealing end plates into covers

Definitions

  • the present invention relates to a heat exchanger according to the preamble of claim 1.
  • the heat exchanger includes a tank 1 and base plate 2 as shown in FIG. 10.
  • unfolded metal plates are respectively folded and the folded portions are connected to each other to form the tank 1 and the base plate 2.
  • connection surfaces are formed at folded portions of the tank 1 to ensure a connection area to be brazed.
  • a claw portion 3 for receiving an insert plate for holding a core portion of the heat exchanger is provided on a folded portion of the base plate 2 in lateral direction (i.e., a short side portion) as shown in FIG. 10. Since a brazing material is clad on the core portion before brazing, the insert plate may extend outwardly in a longitudinal direction of the base plate so that the claw portion 3 may extend outwardly in the longitudinal direction of the base plate. Therefore, the folded portion of the base plate in the lateral direction also extends outwardly in the longitudinal direction of the base plate 2 so that the clearance 51 shown in FIG. 11 is further enlarged. Thus, the tank 1 and the base plate 2 cannot be securely connected and brazed to each other.
  • a protrusion protrudes from an inner wall of the base plate to be opposite to a connection portion between folded portions of the tank. Therefore, a clearance formed between an outside of the connection portion of the folded portions of the tank and an inside of the base plate is greatly decreased to securely braze a joined portion between the tank and the base plate.
  • a rib for increasing stiffness of the base plate in a longitudinal direction is provided in a claw portion formed on a folded portion of the base plate in the lateral direction. Therefore, even if a force extending outwardly in a longitudinal direction of the base plate is applied to the base plate before brazing, the folded portion of the base plate is not bent outwardly by forming the rib. Thus, the clearance between the tube and the base plate is not enlarged in assembling process of the heat exchanger, and a brazing between the tube and the base plate can be securely performed.
  • a heat exchanger includes a tank 1 formed in a U-shape in a cross-section thereof and a base plate 2 connected to an opening end portion of the tank 1.
  • the base plate 2 is also formed in a U-shape in a cross-section thereof.
  • a plurality of tube receiving holes 4 are provided on the base plate 2 in such a manner that a longitudinal direction of the flat holes 4 for receiving the tubes is parallel to a lateral direction of the base plate 2.
  • a cross-section of a flat tube 5 is formed in a flat shape, and each end portion of the flat tube 5 is inserted into and joined with the tube receiving holes 4 of the base plate 2.
  • a plurality of corrugated fins 6 are formed in a wavy shape and are disposed between the flat tubes 5 to be joined with the flat tubes 5.
  • Both insert plates 7 are respectively disposed at both side portions of a core portion (i.e., heat exchanging portion) having the flat tubes 5 and the corrugated fins 6 and are connected to the base plates 2 and the corrugated fins 7.
  • An inlet pipe 8 for warm water e.g., engine cooling water
  • An outlet pipe 9 for cooled water e.g., engine cooling water
  • a structure of the heat exchanger in FIG. 1 is a symmetrical structure with respective to the left and right direction, the positions of inlet pipe 8 and the outlet pipe 9 may be changed.
  • the heater core shown in FIG.1 is structured by an aluminum heat exchanger integrally connected by brazing.
  • the corrugated fins 6, the inlet pipe 8 and the outlet pipe 9 are made of aluminum bare material in which a brazing material is not clad, other materials (1, 2, 5 and 7) are made of an aluminum clad material in which a brazing material is clad at both sides of the aluminum core material.
  • FIG. 2 shows an unfolded state of a metal plate forming the tank 1.
  • An unfolded metal plate 13 has a rectangular body portion 13a, and first folded portions 13f are formed in the body portion 13 along a long side portion thereof. Further, second folded portions 13b protruding from short side portions of the body portion 13a are formed. A plurality of semicircular protrusions 13c are formed proximate to long ends of body portion 13a. Connection surfaces 13d for ensuring brazing by increasing a connection area to be brazed are formed at both outer edge portions formed in a vertical direction of the second folded portions 13b.
  • the unfolded metal plate 13 for the tank 1 is formed in a tank shape shown FIG. 3, that is, a tank shape (i.e., box shape) having a U-shaped cross section.
  • a tank shape i.e., box shape
  • FIGS. 2 and 3 by folding the first and second folded portions 13f and 13b and the connection surface 13d at a ridgeline 13e shown with dotted lines in FIG. 2, the tank where one end side is opened and another end side is closed is formed.
  • connection surfaces 13d of the second folded portions 13b contact inner surfaces of the first folded portions 13f to increase the brazing area therebetween. Therefore, the ridgeline 13e of the first folded portion 13f is offset outwardly from the ridgeline 13e of the connection surface 13d by a plate thickness d1 of the unfolded metal plate 13.
  • an unfolded metal plate 14 for the base plate has the same shape as the unfolded metal plate 13 for the tank.
  • the unfolded metal plate 14 includes a rectangular body portion 14a, first folded portions 14b and second folded portions.
  • the first folded portions 14b are formed along a long side portion of the body portion 14a, and the second folded portions 14c are formed to protrude from short side portions of the body portion 14a.
  • a plurality of semicircular concave portions are formed on the first folded portions 14b of the body portion 14a to correspond to the semicircular protrusions 13c of the unfolded metal plate 13.
  • a dotted line 14e illustrates a ridgeline as a folding position of the first and second folded portions 14b and 14c. End portions in the longitudinal direction of the second folded portion 14c are offset outwardly from the dotted line 14e of the first folded portions 14b by a plate thickness d2 of the unfolded metal plate 14. Therefore, after folding the first and the second folded portions 14b and 14c, the second folded portions 14c can be folded on end surfaces of the first folded portions (see FIG. 3). Thus, the second folded portions 14c can be securely brazed on the end surfaces of the first folded portions 14b.
  • the first and second folded portions 14b and 14c are folded along the dotted line 14c so that the metal plate 14 is formed in a shape shown in FIG. 3, i.e., a box shape in which one end side is closed and another end side is opened. Since the second folded portions 14c are folded on the end surfaces of the first folded portions 14b, a brazing area between the first and second folded portions 14b and 14c is increased to sufficiently braze therebetween.
  • the tank 1 and the base plate 2 are assembled in such a manner that the first and second folded portions 13f and 13b of the tank are inserted into inner peripheral sides of the first and second folded portions 14b and 14c of the base plate 2.
  • the semicircular protrusions 13c of the tank 1 into the semicircular concave portions 14c of the base plate 2
  • an assembled state of the tank 1 and the base plate 2 can be maintained to prevent the tank 1 and the base plate 2 from being separated after being assembled together.
  • protrusion portions 15 are formed inside the second folded portions 14c of the base plate 2, and the protrusion portions 15 protrude from the second folded portions 14c of the base plate 2 to be opposite to a position where the first and second folded portions 13f and 13b are connected to each other.
  • the protrusion portions 15 are formed by an ironing process at the same time as the folding step of the base plate 2.
  • clearances (51) formed at connection portions between the first and second folded portions 13f and 13b of the tank 1 are filled. Therefore, a brazing between the tank 1 and the base metal 2 can be securely performed.
  • the second folded portion 14 of the base plate 2 is formed by the ribs 16, a rigidity of the base plate 2 in the longitudinal direction thereof can be improved. Even if the insert plate 7 is inserted into the claw portions 3 so that the insert plate 7 extends outwardly in the longitudinal direction of the tube 1 before brazing, the second folded portion 14c of the base plate 2 is not bent outwardly by forming the ribs 16 due to the concave portions. Thus, in this embodiment, the clearances 51 (see FIG. 11) formed at a connection portion between the first and second folded portions 13f and 13b of the tank 1 is not further enlarged. Therefore, a brazing between the tank 1 and the base metal 2 can be securely performed.
  • the ribs 16 due to the concave portions are formed by a coining process or a press process in an unfolded metal plate before folding the base plate 2.
  • the claw portions 3 for receiving the insert plate 7 are formed on the second folded portion 14 of the base plate 2, and a concave portion 18 is formed in each claw portion 3.
  • the concave portions 18 the rigidity of the claw portion 3 is increased, and the insert plate 7 is accurately set to prevent the insert plate 7 from being shifted in the lateral direction of the tank 1 when the insert plate 7 is inserted into the claw portions 3.
  • small holes are formed at an end portion of the insert plate 7 to engage with the convex portions 18.
  • connection surface of the tank 1 and base plate 2 on the connection surface of the tank 1 and base plate 2, the connection surface is provided in the second folded portion 13b of the tank 1 and the protrusion portion 15 is provided inside the second folded portion 14b of the base plate 2.
  • a connection surface may be provided in the first folded portion 13a of the tank 1 and the protrusion portion 15 may be provided at a position of the first folded portion 14a of the base plate 2 to be opposite to the connection surface.
  • the ribs 16 formed in the second folded portion 14b of the base plate 2 may be formed in the first folded portion 14a of the base plate 2.
  • the present invention is not limited to a heater core for a heater and can be used widely in a heat exchanger for an automotive radiator or the like.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Details Of Heat-Exchange And Heat-Transfer (AREA)
  • Air-Conditioning For Vehicles (AREA)

Claims (11)

  1. Echangeur de chaleur comprenant :
    un réservoir (1) sous forme de boíte qui est en forme de U en section transversale et dans lequel un côté d'extrémité est fermé et un autre côté d'extrémité est ouvert, ledit réservoir comprenant des première et deuxième parties pliées (13f, 13b) raccordées l'une à l'autre pour former une partie de raccordement, comportant un jeu (51) formé au niveau ladite partie de raccordement desdites première et deuxième parties pliées (13f, 13b) dudit réservoir (1) ;
    une plaque de base (2) sous forme de boíte qui est en forme de U en section transversale et dans laquelle un côté d'extrémité est fermé et un autre côté d'extrémité est ouvert, ladite plaque de base est raccordée audit réservoir pour couvrir ledit côté ouvert dudit réservoir, ladite plaque de base comprenant des première et deuxième parties pliées (14b, 14c) fixées auxdites première et deuxième parties pliées (13f, 13b) dudit réservoir et une partie de fond comportant un trou (4) dans celle-ci ;
       dans lequel lesdites parties pliées (13f, 13b) dudit réservoir 1 sont insérées dans les surfaces périphériques internes desdites parties pliées (14b, 14c) de ladite plaque de base (2) ; un tube (5) inséré dans ledit trou de ladite plaque de base et fixé à ladite plaque de base pour communiquer avec ledit réservoir ;
       caractérisé par
       une saillie (15) faisant saillie depuis une surface interne de ladite deuxième partie pliée (14c) de ladite plaque de base (2) pour être opposée à ladite partie de raccordement entre lesdites parties pliées (13f, 13b) dudit réservoir,
       dans lequel la saillie (15) remplit le jeu (51) afin d'améliorer une jonction brasée entre le réservoir et la plaque de base.
  2. Echangeur de chaleur selon la revendication 1, dans lequel chacun dudit réservoir et de ladite plaque de base est fabriqué à partir d'une plaque métallique non pliée (13 et 14) par pliage.
  3. Echangeur de chaleur selon la revendication 2, dans lequel ladite plaque métallique non pliée comprend :
    une partie de corps rectangulaire (13a et 14a) comportant une paire de premiers côtés et une paire de deuxièmes côtés, une longueur de chaque premier côté étant plus importante que celle de chaque deuxième côté ;
    une paire de premières parties pliées (13f et 14b) formées le long desdits premiers côtés de ladite partie de corps ;
    une paire de deuxièmes parties pliées (13b et 14c) formées le long desdits deuxièmes côtés de ladite partie de corps,
       dans lequel lesdites premières et deuxièmes parties pliées sont pliées et raccordées l'une à l'autre pour former une boíte.
  4. Echangeur de chaleur selon la revendication 3, dans lequel ladite partie pliée de ladite plaque métallique non pliée (13, 14) comporte une surface de raccordement raccordant ledit réservoir (1) et ladite plaque de base (2).
  5. Echangeur de chaleur selon la revendication 4, dans lequel ladite surface de raccordement est prévue au niveau de ladite deuxième partie pliée (13b) de ladite plaque métallique non pliée (13) pour ledit réservoir (1).
  6. Echangeur de chaleur selon la revendication 3, dans lequel ladite saillie (15) est prévue au niveau de ladite deuxième partie pliée (14c) de ladite plaque métallique non pliée (14) pour ladite plaque de base (2).
  7. Echangeur de chaleur selon la revendication 3, comprenant de plus :
    une plaque d'insertion (7) destinée à maintenir ledit tube ; et
    une partie de griffe (3) destinée à recevoir ladite plaque d'insertion dans celle-ci, dans lequel ladite partie de griffe est prévue sur ladite deuxième partie pliée de ladite plaque métallique non pliée pour ladite plaque de base.
  8. Echangeur de chaleur selon la revendication 3, dans lequel ladite deuxième partie pliée (14c) de ladite plaque métallique (14) pour ladite plaque de base (2) comporte une nervure (16) destinée à augmenter la rigidité de ladite plaque de base dans une direction longitudinale de celle-ci.
  9. Echangeur de chaleur selon la revendication 7, dans lequel ladite partie de griffe comporte une partie concave (18).
  10. Procédé de fabrication d'un échangeur de chaleur comprenant un réservoir en forme de boíte (1) comportant des première et deuxième parties pliées (13f, 13b) raccordées l'une à l'autre pour former une partie de raccordement comportant un jeu (51) au niveau de la partie de raccordement desdites parties pliées (13f, 13b), une plaque de base en forme de boíte (2) et un tube (5), ledit procédé comprenant les étapes consistant à :
    couper une première plaque métallique (13) pour former ledit réservoir en forme de boíte ;
    couper une deuxième plaque métallique (14) pour former ladite plaque de base et réaliser un trou (4) à travers lequel ledit tube est inséré pour communiquer avec ledit réservoir ;
    plier ladite première plaque métallique (13) selon une ligne de pliage prédéterminée pour former ledit réservoir (1) en une forme de boíte qui est en forme de U en section transversale et dans lequel un côté d'extrémité est fermé et un autre côté d'extrémité est ouvert ;
    plier ladite deuxième plaque métallique (14) selon une ligne de pliage prédéterminée pour former ladite plaque de base (2) en une forme de boíte qui est en forme de U en section transversale et dans laquelle un côté d'extrémité est fermé et un autre côté d'extrémité est ouvert, et former une saillie (15) sur ladite deuxième plaque métallique pour être opposée à ladite partie de raccordement entre lesdites parties pliées (13f, 13b) dudit réservoir ;
    insérer une partie d'extrémité dudit tube (5) dans ledit trou de ladite plaque de base (2) et assembler ledit réservoir (1) avec ladite plaque de base pour couvrir ladite ouverture dudit réservoir,
       dans lequel lesdites parties pliées (13f, 13b) dudit réservoir sont insérées dans les surfaces périphériques internes desdites parties pliées (14b, 14c) de ladite plaque de base, et dans lequel la saillie (15) remplit le jeu (51) et
       braser ledit réservoir, ladite plaque de base et ledit tube solidairement pour réaliser un corps assemblé.
  11. Procédé de fabrication d'un échangeur de chaleur selon la revendication 10, dans lequel ledit pliage de ladite deuxième plaque métallique et ledit formage de ladite saillie sont réalisés simultanément.
EP97118461A 1996-10-23 1997-10-23 Echangeur de chaleur Expired - Lifetime EP0838652B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP28073496A JP3674189B2 (ja) 1996-10-23 1996-10-23 熱交換器
JP28073496 1996-10-23
JP280734/96 1996-10-23

Publications (3)

Publication Number Publication Date
EP0838652A2 EP0838652A2 (fr) 1998-04-29
EP0838652A3 EP0838652A3 (fr) 1999-04-14
EP0838652B1 true EP0838652B1 (fr) 2002-08-14

Family

ID=17629211

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97118461A Expired - Lifetime EP0838652B1 (fr) 1996-10-23 1997-10-23 Echangeur de chaleur

Country Status (5)

Country Link
US (1) US5944095A (fr)
EP (1) EP0838652B1 (fr)
JP (1) JP3674189B2 (fr)
KR (1) KR100247888B1 (fr)
DE (1) DE69714683T2 (fr)

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JP3678159B2 (ja) * 2001-03-23 2005-08-03 株式会社デンソー 熱交換器
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US7798206B2 (en) * 2006-02-07 2010-09-21 Showa Denko K.K. Heat exchanger and method of manufacturing the same
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WO2008067970A1 (fr) * 2006-12-04 2008-06-12 Behr Gmbh & Co. Kg Boîtier destiné à recevoir un liquide destiné à un échangeur thermique, procédé de réalisation d'un tel boîtier, et échangeur thermique
KR101311035B1 (ko) * 2008-04-17 2013-09-24 다나 캐나다 코포레이션 Ｕ 흐름 열교환기
FR2933175B1 (fr) * 2008-06-26 2014-10-24 Valeo Systemes Thermiques Echangeur de chaleur comportant un faisceau d'echange de chaleur et un boitier
US10215509B2 (en) * 2016-06-21 2019-02-26 Hanon Systems Coined header for heat exchanger
US10527364B2 (en) * 2017-03-03 2020-01-07 Enterex America LLC Heat exchanger manifold with header groove reinforcement member
US11137210B2 (en) * 2019-08-07 2021-10-05 Denso International America, Inc. Heat exchanger
USD967361S1 (en) * 2020-08-17 2022-10-18 Mercracing, Llc Heat exchanger

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Also Published As

Publication number Publication date
KR19980033019A (ko) 1998-07-25
KR100247888B1 (ko) 2000-04-01
EP0838652A2 (fr) 1998-04-29
EP0838652A3 (fr) 1999-04-14
JP3674189B2 (ja) 2005-07-20
JPH10122784A (ja) 1998-05-15
DE69714683D1 (de) 2002-09-19
DE69714683T2 (de) 2003-04-10
US5944095A (en) 1999-08-31

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